Differential D91292 Diff 308912 libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/default.pass.cpp

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libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.cons/default.pass.cpp

	//===----------------------------------------------------------------------===//			//===----------------------------------------------------------------------===//
	//			//
	// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.			// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
	// See https://llvm.org/LICENSE.txt for license information.			// See https://llvm.org/LICENSE.txt for license information.
	// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception			// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
	//			//
	//===----------------------------------------------------------------------===//			//===----------------------------------------------------------------------===//

	// <strstream>			// <strstream>

	// class strstreambuf			// class strstreambuf

	// explicit strstreambuf(streamsize alsize_arg = 0);			// explicit strstreambuf(streamsize alsize_arg = 0); // before C++20
				// strstreambuf() : strstreambuf(0) {} // C++20
				// explicit strstreambuf(streamsize alsize_arg); // C++20

	#include <strstream>			#include <strstream>
	#include <cassert>			#include <cassert>

	#include "test_macros.h"			#include "test_macros.h"
				#if TEST_STD_VER >= 11
				#include "test_convertible.h"
				#endif

	int main(int, char**)			int main(int, char**)
	{			{
	{			{
	std::strstreambuf s;			std::strstreambuf s;
	assert(s.str() == nullptr);			assert(s.str() == nullptr);
	assert(s.pcount() == 0);			assert(s.pcount() == 0);
	}			}
	{			{
	std::strstreambuf s(1024);			std::strstreambuf s(1024);
	LIBCPP_ASSERT(s.str() == nullptr);			LIBCPP_ASSERT(s.str() == nullptr);
	assert(s.pcount() == 0);			assert(s.pcount() == 0);
	}			}

				#if TEST_STD_VER >= 11
				{
				typedef std::strstreambuf B;
				#if TEST_STD_VER > 17
				static_assert(test_convertible<B>(), "");
				#else
				static_assert(!test_convertible<B>(), "");
				#endif
				static_assert(!test_convertible<B, std::streamsize>(), "");
				}
				#endif

	return 0;			return 0;
	}			}